Ebyte E840-DTU User Manual page 12

4g/lte serial server

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Chengdu Ebyte Electronic Technology Co. Ltd

For example： AA FE 55 00 00 03 11 22 33

time

11 22 33：real data

Demonstration：

Take SOCK2 as an example：，

Transmit：+++(do not add new line for transmitting )

Transmit：AT+VER(add new line for transmitting )

same time

+OK=E840-DTU(4G-01)_V1.0

Transmit ： AT+SOCK2=1,TCPC,116.62.42.192,31687

+OK

Transmit：AT+LINKSTA2

+OK=Connect

Transmit：AT+POTOCOL=ON

+OK

Transmit：AT+POTOCOL

+OK=ON

AT+REBT

+OK

Waiting for the radio to restart, SOCK2 will automatically establish a connection with the server. After the connection is

started, data can be transmitted to each other via protocol.

//00: SOCK0 link，

//enter AT command

//read version info. And enter AT command setting at the

//open SOCK2 and configure the network server

parameters that SOCK2 will connect to (the parameter used

here is Ebyte test server, not recommended for users)

//read if SOCK2 has started connection with server

// open protocol transmission mode

//inquire if protocol transmission is on

//restart

E840-DTU(4G-02)User Manual

00 03：the valid data length received this

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